Pressure-regulator.



No. 658,570. Patented Sept. 25, I900. J. A. MOSHEB &. W. WISHART.

PRESSURE REGULATOR.

(Application filed Apr. 16, 1900.)

(No lludel.)

7717/10/22 WEB/IQ 1'7" Ni'rnn STATES PATENT 0FFICE JOHN A. MOSHER ANDWILLIAM WISHART, OF CHICAGO, ILLINOIS, AS- I SIGNORS TO THE ADAMS &;WESTLAKE COMPANY, OF ILLINOIS.

PRES SU RE-REG U LATOR.

SPECIFICATION forming part of Letters Patent No. 658,570, datedSeptember 25, 1900.

Application filed April 16, 1900.

To aZZ whom it may concern.-

Be it known that we, JOHN A. MOSHER and WILLIAM WISHART, citizens of theUnited States, and residents of Chicago, county of Oook,and State ofIllinois, have invented certain new and useful Improvements inPressure-Regulators, of which the following is a specification, andwhich are illustrated in the accompanying drawings, forming a partthereof.

This invention relates to regulators particularly adapted to control thepressure of gas, and is designed especially for service in connectionwith the gas that is to be delivered at a low pressure.

The objects of the invention are to simplify the construction of devicesof this type, to render the regulator extremely sensitive, and to securedurability. These objects are attained in the construction hereinafterdescribed,and which is shown in the accompanying drawings, in whichFigure 1 is a plan view of the regulator with some of the parts brokenaway for the purpose of showing the internal construction, and Fig. 2 isa sectional view on the broken line 2 2 of Fig. l.

The case is cup or dish shaped, having at its upper edge a radial flangel1 and being covered by a plate 12, adapted to rest upon and be securedto the flange. A flexible diaphragm 13 is secured between the plate 12and the flange 11, so as to make a tight joint therewith. The plate 12is preferably perforated, as shown, so as to allow the free movement ofair therethrough.

The induction-nipple is shown at 14 and the eduction-nipple at 15. Theinductionnipple is provided with a valve 16, controlled by the diaphragm13 through the medium of a toggle comprising the members 17 and 19 andthe stem 20. The toggle member 17 is pivoted at 18 to a bracket securedwithin the case 10. The toggle member 19 bears against the back of thevalve 16 and is joined to the toggle member 17 by means of a pin 21,.which also passes through the stem 20.

A leaf-spring 22 secured at 23 to the bottom of the case 10, engages astirrup 24, depending from the toggle member 17 near its anchored end,the action of the spring being Serial No; 13.032. (N0 model.)

to flex the toggle, while the outward movement of the diaphragm underthe influence of the gas-pressure within the case tends to straightenthe toggle in opposition to this spring.

The back of the valve 16 is centrally recessed to receive the end of thetoggle member 19, and the valve is connected to such member by means ofthe contractile coilsprings 25 25, which draw the valve tightly againstthe end of the toggle member.

The valve 16 comprises the metallic block 26 and the facing 27 of ayielding material, such as leather, these two parts being securedtogether by a band 28, threaded to engage the periphery of the block 26and having an instanding flange for securing the facing 27. The valve isprovided with a stem 29, rigidly secured to the block 26 and projectingoutwardly through the nipple 14, which is provided with internalguide-brackets 30 and 31 for such stem.

In regulators of this type, particularly such as are designed for use inconnection with gas to be delivered at a low pressure, it is of greatimportance that extreme sensitiveness of action be secured, and to thisend it is important that the spring tension for opening the valve, whilebeing light, shall nevertheless be certain, and it is also of the utmostimportance that lost motion be avoided, so that the valve will be movedhowever slight may be the movement of the diaphragm. These advantagesare secured in the construction forming the subject of this applicationby the use of the strong leaf-spring 22, which may be, as shown,reinforced by a supplemental spring 22, this spring being applied to thetoggle member near its pivotal point, so that the diaphragm controls itby a strong leverage, the springnevertheless having great reserve forcebecause of its size. This arrangement of spring has the added advantagethat the use of fine wire, which is necessarily short-lived, is avoided.

By the form of connection shown between I the toggle member 19 and thevalve, whereby there is a simple thrust contact, while the two parts arealways held tightly together by the action of the springs 25, all lostmotion at this point is avoided, so that the slightest movement of thetoggle insures a movement of the valve. This form of connection has theadded advantage that any lateral movement of the toggle does not tend tocant the valve, and hence prevent'it from being firmly seated. Thepivots of the toggle being transverse to the plane of its movement, nolateral displacement is possible beyond the range of the slight lostmotion which may exist, so that should there be any lack of uniformityin the flexibility of the diaphragm there can be no sidewise movement ofthe toggle connection thereby.

We have found in actual practice that with a gas-service pressure offifteen pounds the delivery pressure can be reduced to two ounces andmaintained without fluctuation, so that there is no appreciablevariation in the flame at the gas-burners.

We claim as our invention- 1. In a gas-pressure regulator, incombination, a case having induction and eduction ports, a valve for theinduction-port, a flexible diaphragm within the case, a lever actu atedby the diaphragm and'having a thrustbearing against the valve, and aspring connection between the lever and the valve to hold them incontact.

2. In a gas-pressure regulator, incombination, a case having inductionand eduction ports, a flexible diaphragm within the case, a valveapplied to the induction-port, a toggle having one member pivotallyanchored to the case and its other end having a thrustbearing againstthe valve, spring connection between the valve and the toggle to holdthem in contact, connection between the diaphragm and the toggle, and aleaf-spring for flexing the toggle and being fixed to a wall of the caseand applied to the anchored toggle member.

JOHN A. MOSHER. WILLIAM WISHART.

Witnesses:

G. L. WALTERS, LoUIs V. EGGERT.

